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Series PB56 Purge and Balancing Valves are used in heating applications
on boiler return piping to facilitate removal of air from heating zones
on initial fill and to control water flow through circulation loop. It
also serves as a shutoff valve and a drain valve for each zone or loop.

It consists of a bronze body construction with inlet x outlet solder
connections, male hose thread connection for blow-off, and balancing
adjustment. It is a self-contained, tight seating ball valve and is
ideal for pipelines that require exceptionally high capacity purging.